The World's Finest Assassin Gets Reincarnated in Another World as an Aristocrat, Vol. 2 (manga)

To become the head of the Tuatha D-Lugh must travel to thecommercial city
of Milteu and become a merchant there. Joined by Tarte and anew assistant, Maha, his
plan to assassinate the hero seemed to be comingtogether, but...